void simpledisk_bus_ownership_grant (int devno, ioreq_event *curr, int busno, double arbdelay)
{
simpledisk_t *currdisk;
ioreq_event *tmp;
currdisk = getsimpledisk (devno);
#ifdef DEBUG_SIMPLEDISK
fprintf (outputfile, "*** %f: simpledisk_bus_ownership_grant - devno %d, type %d, cause %d, blkno %d\n", simtime, curr->devno, curr->type, curr->cause, curr->blkno);
#endif
tmp = currdisk->buswait;
while ((tmp != NULL) && (tmp != curr)) {
tmp = tmp->next;
}
if (tmp == NULL) {
fprintf(stderr, "Bus ownership granted to unknown simpledisk request - devno %d, busno %d\n", devno, busno);
exit(1);
}
currdisk->busowned = busno;
currdisk->stat.waitingforbus += arbdelay;
//ASSERT (arbdelay == (simtime - currdisk->stat.requestedbus));
currdisk->stat.numbuswaits++;
bus_delay(busno, DEVICE, devno, tmp->time, tmp);
}
/*
* ssd_send_event_up_path()
*
* Acquires the bus (if not already acquired), then uses bus_delay to
* send the event up the path.
*
* If the bus is already owned by this device or can be acquired
* immediately (interleaved bus), the event is sent immediately.
* Otherwise, ssd_bus_ownership_grant will later send the event.
*/
static void ssd_send_event_up_path (ioreq_event *curr, double delay)
{
ssd_t *currdisk;
int busno;
int slotno;
// fprintf (outputfile, "ssd_send_event_up_path - devno %d, type %d, cause %d, blkno %d\n", curr->devno, curr->type, curr->cause, curr->blkno);
currdisk = getssd (curr->devno);
ssd_assert_current_activity(currdisk, curr);
busno = ssd_get_busno(curr);
slotno = currdisk->slotno[0];
/* Put new request at head of buswait queue */
curr->next = currdisk->buswait;
currdisk->buswait = curr;
curr->tempint1 = busno;
curr->time = delay;
if (currdisk->busowned == -1) {
// fprintf (outputfile, "Must get ownership of the bus first\n");
if (curr->next) {
//fprintf(stderr,"Multiple bus requestors detected in ssd_send_event_up_path\n");
/* This should be ok -- counting on the bus module to sequence 'em */
}
if (bus_ownership_get(busno, slotno, curr) == FALSE) {
/* Remember when we started waiting (only place this is written) */
currdisk->stat.requestedbus = simtime;
} else {
currdisk->busowned = busno;
bus_delay(busno, DEVICE, curr->devno, delay, curr); /* Never for SCSI */
}
} else if (currdisk->busowned == busno) {
//fprintf (outputfile, "Already own bus - so send it on up\n");
bus_delay(busno, DEVICE, curr->devno, delay, curr);
} else {
fprintf(stderr, "Wrong bus owned for transfer desired\n");
exit(1);
}
}
void simpledisk_bus_ownership_grant (int devno, ioreq_event *curr, int busno, double arbdelay)
{
simpledisk_t *currdisk;
ioreq_event *tmp;
currdisk = getsimpledisk (devno);
tmp = currdisk->buswait;
while ((tmp != NULL) && (tmp != curr)) {
tmp = tmp->next;
}
if (tmp == NULL) {
fprintf(stderr, "Bus ownership granted to unknown simpledisk request - devno %d, busno %d\n", devno, busno);
exit(1);
}
currdisk->busowned = busno;
currdisk->stat.waitingforbus += arbdelay;
//ASSERT (arbdelay == (simtime - currdisk->stat.requestedbus));
currdisk->stat.numbuswaits++;
bus_delay(busno, DEVICE, devno, tmp->time, tmp);
}
